continues into who may have sent letters with ricin, possibly that is still being tested, to president obama and to u.s. senator roger wicker. what had happened, at its off site mailing screening centers, authorities intercepted these letters. there were preliminary results saying they had tested positive for ricin. now authorities are looking whether or not they actually have. these tests usually take for final confirmation anywhere between 24 and 48 hours. so they're waiting on results of that. these are two letters the fbi says came from tennessee. so they continued their investigation there. meanwhile on capitol hill today, in a number of senate office buildings there were reports of suspicious packages, suspicious envelopes, suspicious packages being sent to state offices, local offices of u.s. senators. much of that has been cleared already. this is heightened sense of really, sensitivity here in washington, d.c. to watch out for all of these kind of things. u.s. capitol police and authorities are asking staff and lawmakers to be ever vigilant here. so far this seems to be the by-produ